Abstract
Emulsified fuel combustion is supposed to be effective for the reduction of thermal NO_x and particulate matter. In our previous study, concentration of CO and HC in the exhaust gas decreased as the diameter of the waterdrops in emulsion droplets increased, when we used W/O emulsified fuels for a single cylinder 4-cycle diesel engine. So we examined the effect of waterdrop diameter on exhaust emissions of the diesel engine and microexplosin occurrence. Consequently, concentration of HC and CO decreased for larger waterdrop diameter, and the waterdrop diameter did not influence on the frequency of microexplosion but the special scale of the microexplosions.
